On 1/30/14, 1:08 PM, Richard Gomes wrote:

This is the culprit: /dev/sdb1 is not known as ext4, as it should be.

I don't know how to affect that, but are you sure that's actually the
problem?

In my experience, a boot problem involving mirrored RAID 1 is more
likely to be a GRUB issue, needing to be fixed with something like:

# grub-install /dev/sdb

(This assumes that /dev/sdb1 really is a valid mirror of /dev/sda1; I'm
taking that on faith because you didn't include the output of "mdadm
--detail" and "mdadm --examine".)

-- 
Robert L Mathews, Tiger Technologies, http://www.tigertech.net/